<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>

    (function(){
        function alert(s){
            console.log(s);
        }
        alert('aaaa');
    })()



    alert("bbbbb")



</script>
</body>
</html>